In the charge against global warming, carbon dioxide has long held sway as public enemy number one. But now, less-
recognized molecules are entering the fray as significant agents of global warming. Aerosols emitted from smokestacks,
exhaust pipes and domestic cooking fires consist of substances such as sulphates and nitrates that scatter light and have a
local cooling effect; they also contain black carbon - or soot - a byproduct of incomplete combustion, which absorbs light. [Source: Nature Reports Climate Change]